public class Main {
    public static void main(String[] args) {
        MobileTelephone m = new MobileTelephone();
        SIM s1 = new SIMOfChinaMobile();
        m.useSIM(s1);
        m.print();
        SIM s2 = new SIMOfChinaMobile();
        m.useSIM(s2);
        m.print();
    }
}